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Optimize microkeratome settings for minimal deviation

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MAINZ, Germany — Individualizing a microkeratome’s settings may help to decrease flap complications, according to an animal study.

Stefanie Hoffmann, PhD, and colleagues with Johannes Gutenberg University cut corneal flaps in 135 pig eyes with an Amadeus microkeratome (AMO) at various head-advance and oscillation rates. They also made corneal flap cuts on 28 pig eyes using the Carriazo/Barraquer microkeratome (Supratome, Moria).

Significant differences in flap thickness were measured as a result of oscillation rate and head advance, the authors found. In the Amadeus, optimal cut quality was achieved with 1 mm/second head advance and 8,000 rpm. The smallest target deviations in flap thickness were obtained with this setting. The Amadeus demonstrated a statistically significant lower deviation from the target thickness and had a lower range than the Supratome, the authors wrote in the February issue of Graefe’s Archive of Clinical and Experimental Ophthalmology.